Former President Bill Clinton waves to the delegates as he stands with President Barack Obama after Clinton addressed the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/J. Scott Applewhite)

By JULIE PACE AND CALVIN WOODWARD, ASSOCIATED PRESS

CHARLOTTE, N.C. — President Barack Obama goes before the Democratic National Convention and the nation on Thursday for a capstone speech designed not just to persuade undecided voters to swing his way in a tight election but to put fire in the belly of his supporters and get them to come out on Election Day.

Obama senior adviser David Plouffe promised the president would give voters "a very clear sense of where he thinks the country needs to go economically, the path we need to take." But he also cautioned that no one should expect Obama to slingshot out of his convention with a big boost in polls that have long signaled a close race.

"We've always believed that there's very little elasticity in the election," said Plouffe, up early to preview the president's speech on morning talk shows, adding: "You're not going to see big bounces in this election. For the next 61 days, it's going to remain tight as a tick."

Citing a chance of thunderstorms, convention organizers scrapped plans for Obama to speak to an enormous crowd in a 74,000-seat outdoor stadium and decided to shoehorn the event under the roof of the convention arena, holding 15,000. That meant no opportunity to reprise the massive show of support, excitement – and on-scene voter registration – from Obama's 2008 acceptance speech before 84,000 in Denver. Republicans said Democrats made the switch because they feared the sight of empty seats.

The GOP keeps nudging Obama supporters to rethink their allegiance to a president seeking re-election in a time of weak economic growth.

The party released a new ad Thursday called "The Breakup," in which a woman tells the president, " This just isn't working ... You're not the person I thought you were. ... I think we should just be friends."

Former President Bill Clinton set up Obama's speech with a rollicking turn on the stage Wednesday in which he offered a strong defense of the president's economic stewardship.

"He inherited a deeply damaged economy, put a floor under the crash, began the long hard road to recovery and laid the foundation for a more modern, more well-balanced economy that will produce millions of good new jobs," said Clinton – the last president to see sustained growth, in the 1990s. "Conditions are improving and if you'll renew the president's contract, you will feel it."

Clinton also preached bipartisanship and a pullback from politics as "blood sport" – this near the end of back-to-back conventions that feasted on rhetorical red meat and even as he ripped the Republican agenda as a throwback to the past, a "double-down on trickle-down" economics that assumes tax cuts for the wealthy will help everyone down the ladder.

Obama campaign strategist David Axelrod, also appearing on morning talk shows, said Clinton's speech had set out the economic choices, "so now the president can talk about the future having some of that underbrush out of the way."

Obama watched Clinton's speech from backstage, then strolled out and embraced him, bringing happy roars from the crowd in his first convention appearance and making for a spirited ending to a trying day for Democrats.

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After passing their platform a day earlier in a smoothly scripted show of unity, Democrats reopened it Wednesday to restore a reference to God that had been stripped out in earlier deliberations.

Republican rival Mitt Romney called quick attention to the omission, branding it as evidence that the Democrats are a "party that is increasingly out of touch with the mainstream." White House aides said Obama himself ordered the party to get God back in. The platform also was altered to declare that Jerusalem "is and will remain the capital of Israel," a view at odds with a carefully neutral U.S. policy but in tune with campaign sensibilities.

It was no accident the president devoted many stops on a pre-convention tour of battleground states to campus crowds of the sort that lifted him to the Democratic nomination and the presidency last time.

"Barack's challenge here is to sort of wake up America and make them realize how serious this election is," Democratic Rep. Sam Farr of California said in an interview at the convention. Judging from his town hall meetings in August, when only 15 or 20 people showed up instead of the usual hundreds, there is a "big apathy about politics right now," regardless of party.

Farr added, "If we have an apathetic America, I'm terrified."

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Former Philadelphia Mayor Ed Rendell, a past chairman of the Democratic party who appeared on CBS "This Morning," said he's still worried "about the base turning out to the degree they did" for Obama in 2008. He cited the battleground states of North Carolina and Virginia in particular.

Speaking of the warm-up speeches by the first lady and former president, Rendell added, "The beauty of Michelle Obama and Bill Clinton is they stoked the base."

Motivation was not an issue in the convention hall, at least not when Clinton spoke.

The hall rocked with cheers as Clinton strode onstage to Fleetwood Mac's "Don't Stop," his 1992 campaign theme song, and he held the crowd rapt as he drifted off his prepared remarks for about 50 minutes.

He accused Republicans of proposing "the same old policies that got us into trouble in the first place" and led to a near financial meltdown. Those, he said, include efforts to provide "tax cuts for higher-income Americans, more money for defense than the Pentagon wants and ... deep cuts on programs that help the middle class and poor children."

"As another president once said, `There they go again,'" Clinton said, paraphrasing Ronald Reagan, who often uttered "There you go again" as a rebuke to Democrats.

"In Tampa," said Clinton, "the Republican argument against the president's re-election was pretty simple: We left him a total mess, he hasn't finished cleaning it up yet, so fire him and put us back in."

Clinton's speech marked the seventh consecutive convention in which he has spoken to party delegates, and the latest twist in a relationship with Obama that has veered from frosty to friendly. The two men clashed in 2008, when Obama outran Hillary Rodham Clinton, the former president's wife, for the Democratic presidential nomination. Hillary Clinton, then a New York senator and now Obama's secretary of state, was in East Timor as the party met but made a cameo appearance on the huge convention screens in a video that celebrated the 12 Democratic female senators now in office.

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President Barack Obama laughs with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

President Barack Obama waves with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

Vice President Joe Biden and President Barack Obama wave to the delegates at the conclusion of Presdident Obama's speech at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/J. Scott Applewhite)

President Barack Obama waves with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

President Barack Obama waves with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

President Barack Obama waves with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

President Barack Obama waves with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Charlie Neibergall)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama stands with his family, (L-R) First lady Michelle Obama, Sasha Obama, and Malia Obama during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

US President Barack Obama, First Lady Michelle Obama, daughters Malia (L) and Sasha (C) wave after Obama's acceptance speech at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

Supporters listen as US President Barack Obama delivers his acceptance to run for a second term as president at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). AFP PHOTO Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage as he accepts the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage as he accepts the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: (L-R) Marian Robinson, Malia Obama, Sasha Obama, First lady Michelle Obama and Second lady Dr. Jill Biden watch as Democratic presidential candidate, U.S. President Barack Obama speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Scott Olson/Getty Images)

From left, Michelle Obama's mother Marian, Malia and Sasha Obama, their mother Michelle and Dr. Jill Biden, wife of Vice President Biden, listen to President Barack Obama at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

US President Barack Obama as he delivers his acceptance to run for a second term as president at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). AFP PHOTO Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/GettyImages)

The First family welcomes US President Barack Obama as he delivers his acceptance to run for a second term as president at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). From L-R, first row: Mother-in-law Marian Robinson, daughter Malia, daughter Sasha, First Lady Michelle Obama, Second Lady Dr. Jill Biden and Mrs.Obama's brother Craig Robinson (3rd R, second row). AFP PHOTO Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/GettyImages)

US President Barack Obama delivers his acceptance to run for a second term as president at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). EDITORS NOTE: Image was shot with a tilt-shift lens. AFP PHOTO Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama claps on stage as he accepts the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage to accept the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage as he accepts the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Kevork Djansezian/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage as he accepts the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

First daughters Malia (L) and Sasha (C) confer as US President Barack Obama delivers his acceptance to run for a second term as president at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

First Lady Michelle Obama (R) looks over at daughters Malia (L) and Sasha (C) as US President Barack Obama delivers his acceptance to run for a second term as president at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

First Lady Michelle Obama (2nd R) looks over at daughters Malia (L) and Sasha (C) as US President Barack Obama delivers his acceptance to run for a second term as president at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 06: (L-R) Malia Obama, Sasha Obama, and First lady Michelle Obama listen as Democratic presidential candidate, U.S. President Barack Obama speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage to accept the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage to accept the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage to accept the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

President Barack Obama waves to candidates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama waves on stage as he accepts the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage to accept the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage to accept the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama speaks on stage to accept the nomination for president during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

President Barack Obama applauds before his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

CHARLOTTE, NC - SEPTEMBER 06: (L-R) Malia Obama, Sasha Obama, and First lady Michelle Obama listen as Democratic presidential candidate, U.S. President Barack Obama speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: (L-R) Malia Obama, Sasha Obama, First lady Michelle Obama and Second lady Dr. Jill Biden watch as Democratic presidential candidate, U.S. President Barack Obama speaks during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: First lady Michelle Obama hughs Democratic presidential candidate, U.S. President Barack Obama on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama hugs his wife First lady Michelle Obama during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama waves on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: (L-R) Malia Obama, Sasha Obama, and First lady Michelle Obama watch as Democratic presidential candidate, U.S. President Barack Obama speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama walks on stage to join First lady Michelle Obama during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama walks on stage to join First lady Michelle Obama during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama walks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: First lady Michelle Obama introduces Democratic presidential candidate, U.S. President Barack Obama during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Sen. Dick Durbin (D-IL) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic vice presidential candidate, U.S. Vice President Joe Biden waves with his wife Second lady Dr. Jill Biden after speaking on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic vice presidential candidate, U.S. Vice President Joe Biden hugs his wife Second lady Dr. Jill Biden after speaking during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic vice presidential candidate, U.S. Vice President Joe Biden speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic vice presidential candidate, U.S. Vice President Joe Biden speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

Vice President Joe Biden waves as he appears on stage to address the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/David Goldman)

Vice President Joe Biden arrives to speak to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Charlie Neibergall)

Vice President Joe Biden speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

First lady Michelle Obama, left and Dr. Jill Biden, wife of Vice President Biden, listen to Vice President Joe Biden at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Charlie Neibergall)

First lady Michelle Obama, left, and her mother Marian Robinson react as Ret. Navy Admiral John B. Nathman, surrounded by members of the armed forces, speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Charles Dharapak)

CHARLOTTE, NC - SEPTEMBER 06: First lady Michelle Obama attends the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: First lady Michelle Obama (L) applauds with her mother Marian Robinson (R) during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Angie Flores speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Sen. John Kerry (D-MA) waves on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Sen. John Kerry (D-MA) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Sen. John Kerry (D-MA) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Sen. John Kerry (D-MA) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Actress Eva Longoria speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Actress Eva Longoria walks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Former Michigan Gov. Jennifer Granholm speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

Caroline Kennedy waves after speaking to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

Former Rep. Gabrielle Giffords waves after reciting the Pledge of Allegiance with Democratic National Committee Chairwoman Rep. Debbie Wasserman Schultz of Florida at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/J. Scott Applewhite)

CHARLOTTE, NC - SEPTEMBER 06: Former U.S. Rep. Gabrielle Giffords (D-AZ) says the Pledge of Allegiance on stage with Democratic National Committee Chair, U.S. Rep. Debbie Wasserman Schultz (D-FL) (L) during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

Chair of the Democratic National Committee Debbie Wasserman Schultz (L) and former congresswoman Gabrielle Giffords embrace after Giffords delivered the Pledge of Allegiance at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). US President Barack Obama is expected to accept the nomination from the DNC to run for a second term as president. AFP PHOTO Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 06: Former U.S. Rep. Gabrielle Giffords (D-AZ) hugs her husband former NASA astronaut Mark Kelly stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Kevork Djansezian/Getty Images)
CORRECTION: A previous version of this caption incorrectly listed Giffords as a Democrat from Nevada. She is from Arizona.

CHARLOTTE, NC - SEPTEMBER 06: Former U.S. Rep. Gabrielle Giffords (D-AZ) walks on stage with Democratic National Committee Chair, U.S. Rep. Debbie Wasserman Schultz (D-FL) (L) during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)
CORRECTION: A previous version of this caption incorrectly listed Giffords as a Democrat from Nevada. She is from Arizona.

CHARLOTTE, NC - SEPTEMBER 06: Former U.S. Rep. Gabrielle Giffords (D-AZ) walks on stage with Democratic National Committee Chair, U.S. Rep. Debbie Wasserman Schultz (D-FL) (L) during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)
CORRECTION: A previous version of this caption incorrectly listed Giffords as a Democrat from Nevada. She is from Arizona.

Rep. Jim Clyburn of South Carolina speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Lynne Sladky)

Vice President Joe Biden looks up at the television monitor as he is nominated for a second term as Vice President during the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Carolyn Kaster)

Beau Biden, Attorney General of Delaware and son of Vice President Joe Biden, addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/Charles Dharapak)

CHARLOTTE, NC - SEPTEMBER 06: Democratic vice presidential candidate, U.S. Vice President Joe Biden and his wife Second lady Dr. Jill Biden watch as their son Attorney General of Delaware Beau Biden speaks during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Kevork Djansezian/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Mayor of Philadelphia Michael Nutter speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

Los Angeles Mayor, Democratic Convention Chair Antonio Villaraigosa speaks at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). US President Barack Obama is expected to accept the nomination from the DNC to run for a second term as president. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

Chair of the Democratic National Committee Debbie Wasserman Schultz speaks at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). US President Barack Obama is expected to accept the nomination from the DNC to run for a second term as president. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 06: Democratic National Committee Chair, U.S. Rep. Debbie Wasserman Schultz (D-FL) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Kevork Djansezian/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic National Committee Chair, U.S. Rep. Debbie Wasserman Schultz (D-FL) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: Democratic National Committee Chair, U.S. Rep. Debbie Wasserman Schultz (D-FL) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

Singer Mary J. Blige performs at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). US President Barack Obama is expected to accept the nomination from the DNC to run for a second term as president. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Rep. John Lewis (D-GA) waves on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Rep. John Lewis (D-GA) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

Member of the US House of Representatives, Georgia, John Lewis speaks to the audience at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). US President Barack Obama is expected to accept the nomination from the DNC to run for a second term as president. AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

Alejandra Salinas, President of the College Democrats of America, speaks at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). US President Barack Obama is expected to accept the nomination from the DNC to run for a second term as president. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

Rep. Barney Frank of Massachusetts holds up the gavel during his address to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012. (AP Photo/J. Scott Applewhite)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Rep. Barney Frank (D-MA) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Rep. Barney Frank (D-MA) kisses his spouse Jim Ready (R) during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Rep. Barney Frank (D-MA) speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06: U.S. Rep. Barney Frank (D-MA) holds the gavel as he speaks on stage during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

Singer Marc Anthony sings the National Anthem at the Time Warner Cable Arena in Charlotte, North Carolina, on September 6, 2012 on the final day of the Democratic National Convention (DNC). US President Barack Obama is expected to accept the nomination from the DNC to run for a second term as president. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

Former President Bill Clinton hugs President Barack Obama after President Obama walked on stage after Clinton's speech the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/J. Scott Applewhite)

Former President Bill Clinton bows as President Barack Obama walks on stage after Clinton's address to the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/J. Scott Applewhite)

The 42nd President of the United States Bill Clinton and the 44th President of the United States Barack Obama acknowledge tha audience at the Time Warner Cable Arena in Charlotte, North Carolina, on September 5, 2012 on the second day of the Democratic National Convention (DNC). The DNC is expected to nominate US President Barack Obama to run for a second term as president on September 6th. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

The 42nd President of the United States Bill Clinton (R) shakes hands with the 44th President Barack Obama at the Time Warner Cable Arena in Charlotte, North Carolina, on September 5, 2012 on the second day of the Democratic National Convention (DNC). The DNC is expected to nominate US President Barack Obama to run for a second term as president on September 6th. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 05: U.S. President Bill Clinton greets Democratic presidential candidate, U.S. President Barack Obama (L) on stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

US President Barack Obama waves alongside former President Bill Clinton after Clinton's speech during the Democratic National Convention (DNC) at the Time Warner Cable Arena in Charlotte, North Carolina, September 5, 2012. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 05: U.S. President Bill Clinton stands with Democratic presidential candidate, U.S. President Barack Obama (R) on stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: U.S. President Bill Clinton hugs Democratic presidential candidate, U.S. President Barack Obama (R) on stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

President Barack Obama, right, and former President Bill Clinton wave to delegates after Clinton's speech to the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Charlie Neibergall)

CHARLOTTE, NC - SEPTEMBER 05: U.S. President Bill Clinton hugs Democratic presidential candidate, U.S. President Barack Obama (R) on stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

Former President Bill Clinton addresses the Democratic National Convention as first lady Michelle Obama is projected on the screen behind him in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Charles Dharapak)

Former President Bill Clinton waves to delegates at the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Lynne Sladky)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton speaks on stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton waves as he takes the stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton speaks on stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

The 42nd President of the United States Bill Clinton addresses the audience at the Time Warner Cable Arena in Charlotte, North Carolina, on September 5, 2012 on the second day of the Democratic National Convention (DNC). The DNC is expected to nominate US President Barack Obama to run for a second term as president on September 6th. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton speaks on stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton waves as he takes the stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton waves as he takes the stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton waves as he takes the stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Former U.S. President Bill Clinton waves as he takes the stage during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Massachusetts Senate candidate Elizabeth Warren speaks during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Attorney Sandra Fluke speaks during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

Georgetown Law School Graduate Sandra Fluke speaks at the Time Warner Cable Arena in Charlotte, North Carolina, on September 5, 2012 on the second day of the Democratic National Convention (DNC). The DNC is expected to nominate US President Barack Obama to run for a second term as president on September 6th. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

CHARLOTTE, NC - SEPTEMBER 05: First lady Michelle Obama sits with her brother Craig Robinson in a box during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Chicago Mayor Rahm Emanuel claps during a speaker during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Massachusetts Senate candidate Elizabeth Warren speaks during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: First lady Michelle Obama poses with a young girl during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: First lady Michelle Obama (R) talks with people in the luxury box during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Alex Wong/Getty Images)

CHARLOTTE, NC - SEPTEMBER 05: Attendees hold signs that say '1.1 Million Auto Jobs Saved' and union related signs during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Win McNamee/Getty Images)

Vice President Joe Biden watches a video monitor during speeches at the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Charlie Neibergall)

CHARLOTTE, NC - SEPTEMBER 05: U.S. Rep. Steny Hoyer (D-MD) greets an attendee during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

President of Planned Parenthood Action Fund Cecile Richards waves to the audience at the Time Warner Cable Arena in Charlotte, North Carolina, on September 5, 2012 on the second day of the Democratic National Convention (DNC). The DNC is expected to nominate US President Barack Obama to run for a second term as president on September 6th. AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

Women from the US Senate hold hands after Sen. Barbara Mikulski of Maryland's speech at the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Charlie Neibergall)

From left, Rep. Emanuel Cleaver II of Missouri and Rep. Karen Bass of California and Rep. Al Green of Texas walk up to the podium to speak at the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Charlie Neibergall)

Sen. Chuck Schumer of New York addresses the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/J. Scott Applewhite)

Sen. Chuck Schumer of New York waves to delegates at the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Lynne Sladky)

Rep. Judy Chu of California waves to delegates before her speech at the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012. (AP Photo/Lynne Sladky)

CHARLOTTE, NC - SEPTEMBER 05: U.S. Sen. John Kerry (D-MA) stands on stage with stage manager David Cove (R) during a walkthrough during day two of the Democratic National Convention at Time Warner Cable Arena on September 5, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Justin Sullivan/Getty Images)

Former Assistant Secretary, U.S. Department of Veterans Affairs Tammy Duckworth speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/Charlie Neibergall)

Former Assistant Secretary, U.S. Department of Veterans Affairs Tammy Duckworth stand at the podium as she speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/Charlie Neibergall)

Former Assistant Secretary, U.S. Department of Veterans Affairs Tammy Duckworth stand at the podium as she speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/Charlie Neibergall)

Rep. Jim Clyburn of South Carolina points across the convention floor at the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/Carolyn Kaster)

Robert Wexler, President of the S. Daniel Abraham Center for Middle East Peace and former Representative from Florida, addresses the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/J. Scott Applewhite)

House Minority Leader Nancy Pelosi and the Democratic women of the House of Reppresentives wave to the delegates atthe Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/J. Scott Applewhite)

Candidate for the House of Representatives Tulsi Gabbard of Hawaii with the women from the House of Representatives at the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/Lynne Sladky)

Mary Kay Henry, International President of the Service Employees International Union (SEIU), addresses the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/J. Scott Applewhite)

Rep. Charles Gonzalez of Texas points to delegates as he walks on stage at the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012. (AP Photo/Lynne Sladky)